Pica/DebugUtils: Add an event triggered after loading a vertex.

src/video_core/command_processor.cpp

@@ -131,6 +131,9 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
                     }
                 }
 
+                if (g_debug_context)
+                    g_debug_context->OnEvent(DebugContext::Event::VertexLoaded, (void*)&input);
+
                 // NOTE: When dumping geometry, we simply assume that the first input attribute
                 //       corresponds to the position for now.
                 DebugUtils::GeometryDumper::Vertex dumped_vertex = {

src/video_core/debug_utils/debug_utils.h

@@ -26,6 +26,7 @@ public:
         CommandProcessed,
         IncomingPrimitiveBatch,
         FinishedPrimitiveBatch,
+        VertexLoaded,
 
         NumEvents
     };